Problems with port-forwarding

I'm having trouble doing the port forwarding. I have to enter my IP, which is the static IP I created, the one close to my router's IP. Then if I go on a site to check what my IP is, like http://whatismyipaddress.com/, it says it's 67.68.107.77, which is way far from what I created. Is it possible that this is an IP address given to me by my ISP? Because after doing all the steps to forward the port with Transmission, I still get the red dot saying Port is closed. I tried to enter the IP that the site said I had in my router, but it didn't work.